Tony Bailey, the Senior Product Manager on the Microsoft Solutions for Secrity & Compliance team, has put together a list of all of our security solutions. You can find it here: http://www.microsoft.com/technet/community/columns/sectip/default.mspx

NIST has opened up a National Vulnerabillity Database, also available as an XML feed. I love the fact that all of the available info will be in one place, although I do fear that it will re-open the "what's more secure" arguments that have been running...